1 files changed, 351 insertions, 0 deletions
diff --git a/external_libs/python/pyzmq-14.7.0/bundled/libsodium/src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c b/external_libs/python/pyzmq-14.7.0/bundled/libsodium/src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c
new file mode 100644
index 00000000..3d7627d2
--- /dev/null
+++ b/external_libs/python/pyzmq-14.7.0/bundled/libsodium/src/libsodium/randombytes/salsa20/randombytes_salsa20_random.c
@@ -0,0 +1,351 @@
+
+#include <sys/types.h>
+#ifndef _WIN32
+# include <sys/stat.h>
+# include <sys/time.h>
+#endif
+
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#ifndef _MSC_VER
+# include <unistd.h>
+#endif
+
+#include "crypto_core_salsa20.h"
+#include "crypto_auth_hmacsha512256.h"
+#include "crypto_stream_salsa20.h"
+#include "randombytes.h"
+#include "randombytes_salsa20_random.h"
+#include "utils.h"
+
+#ifdef _WIN32
+# include <windows.h>
+# include <sys/timeb.h>
+# define RtlGenRandom SystemFunction036
+# if defined(__cplusplus)
+extern "C"
+# endif
+BOOLEAN NTAPI RtlGenRandom(PVOID RandomBuffer, ULONG RandomBufferLength);
+# pragma comment(lib, "advapi32.lib")
+#endif
+
+#define SALSA20_RANDOM_BLOCK_SIZE crypto_core_salsa20_OUTPUTBYTES
+#define SHA512_BLOCK_SIZE 128U
+#define SHA512_MIN_PAD_SIZE (1U + 16U)
+#define COMPILER_ASSERT(X) (void) sizeof(char[(X) ? 1 : -1])
+
+typedef struct Salsa20Random_ {
+    unsigned char key[crypto_stream_salsa20_KEYBYTES];
+    unsigned char rnd32[16U * SALSA20_RANDOM_BLOCK_SIZE];
+    uint64_t      nonce;
+    size_t        rnd32_outleft;
+#ifndef _MSC_VER
+    pid_t         pid;
+#endif
+    int           random_data_source_fd;
+    int           initialized;
+} Salsa20Random;
+
+static Salsa20Random stream = {
+    SODIUM_C99(.random_data_source_fd =) -1,
+    SODIUM_C99(.rnd32_outleft =) (size_t) 0U,
+    SODIUM_C99(.initialized =) 0
+};
+
+static uint64_t
+sodium_hrtime(void)
+{
+    struct timeval tv;
+    uint64_t       ts = (uint64_t) 0U;
+    int            ret;
+
+#ifdef _WIN32
+    struct _timeb tb;
+
+# pragma warning(push)
+# pragma warning(disable: 4996)
+    _ftime(&tb);
+# pragma warning(pop)
+    tv.tv_sec = (long) tb.time;
+    tv.tv_usec = ((int) tb.millitm) * 1000;
+    ret = 0;
+#else
+    ret = gettimeofday(&tv, NULL);
+#endif
+    assert(ret == 0);
+    if (ret == 0) {
+        ts = (uint64_t) tv.tv_sec * 1000000U + (uint64_t) tv.tv_usec;
+    }
+    return ts;
+}
+
+#ifndef _WIN32
+static ssize_t
+safe_read(const int fd, void * const buf_, size_t count)
+{
+    unsigned char *buf = (unsigned char *) buf_;
+    ssize_t        readnb;
+
+    assert(count > (size_t) 0U);
+    do {
+        while ((readnb = read(fd, buf, count)) < (ssize_t) 0 &&
+               (errno == EINTR || errno == EAGAIN));  /* LCOV_EXCL_LINE */
+        if (readnb < (ssize_t) 0) {
+            return readnb; /* LCOV_EXCL_LINE */
+        }
+        if (readnb == (ssize_t) 0) {
+            break; /* LCOV_EXCL_LINE */
+        }
+        count -= (size_t) readnb;
+        buf += readnb;
+    } while (count > (ssize_t) 0);
+
+    return (ssize_t) (buf - (unsigned char *) buf_);
+}
+#endif
+
+#ifndef _WIN32
+static int
+randombytes_salsa20_random_random_dev_open(void)
+{
+/* LCOV_EXCL_START */
+    struct stat       st;
+    static const char *devices[] = {
+# ifndef USE_BLOCKING_RANDOM
+        "/dev/urandom",
+# endif
+        "/dev/random", NULL
+    };
+    const char **     device = devices;
+    int               fd;
+
+    do {
+        fd = open(*device, O_RDONLY);
+        if (fd != -1) {
+            if (fstat(fd, &st) == 0 && S_ISCHR(st.st_mode)) {
+# if defined(F_SETFD) && defined(FD_CLOEXEC)
+                (void) fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
+# endif
+                return fd;
+            }
+            (void) close(fd);
+        } else if (errno == EINTR) {
+            continue;
+        }
+        device++;
+    } while (*device != NULL);
+
+    errno = EIO;
+    return -1;
+/* LCOV_EXCL_STOP */
+}
+
+static void
+randombytes_salsa20_random_init(void)
+{
+    const int errno_save = errno;
+
+    stream.nonce = sodium_hrtime();
+    assert(stream.nonce != (uint64_t) 0U);
+
+    if ((stream.random_data_source_fd =
+         randombytes_salsa20_random_random_dev_open()) == -1) {
+        abort(); /* LCOV_EXCL_LINE */
+    }
+    errno = errno_save;
+}
+
+#else /* _WIN32 */
+
+static void
+randombytes_salsa20_random_init(void)
+{
+    stream.nonce = sodium_hrtime();
+    assert(stream.nonce != (uint64_t) 0U);
+}
+#endif
+
+void
+randombytes_salsa20_random_stir(void)
+{
+    const unsigned char s[crypto_auth_hmacsha512256_KEYBYTES] = {
+        'T', 'h', 'i', 's', 'I', 's', 'J', 'u', 's', 't', 'A', 'T',
+        'h', 'i', 'r', 't', 'y', 'T', 'w', 'o', 'B', 'y', 't', 'e',
+        's', 'S', 'e', 'e', 'd', '.', '.', '.'
+    };
+    unsigned char  m0[crypto_auth_hmacsha512256_BYTES +
+                      2U * SHA512_BLOCK_SIZE - SHA512_MIN_PAD_SIZE];
+    unsigned char *k0 = m0 + crypto_auth_hmacsha512256_BYTES;
+    size_t         i;
+    size_t         sizeof_k0 = sizeof m0 - crypto_auth_hmacsha512256_BYTES;
+
+    memset(stream.rnd32, 0, sizeof stream.rnd32);
+    stream.rnd32_outleft = (size_t) 0U;
+    if (stream.initialized == 0) {
+        randombytes_salsa20_random_init();
+        stream.initialized = 1;
+    }
+#ifndef _WIN32
+    if (safe_read(stream.random_data_source_fd, m0,
+                  sizeof m0) != (ssize_t) sizeof m0) {
+        abort(); /* LCOV_EXCL_LINE */
+    }
+#else /* _WIN32 */
+    if (! RtlGenRandom((PVOID) m0, (ULONG) sizeof m0)) {
+        abort(); /* LCOV_EXCL_LINE */
+    }
+#endif
+    COMPILER_ASSERT(sizeof stream.key == crypto_auth_hmacsha512256_BYTES);
+    crypto_auth_hmacsha512256(stream.key, k0, sizeof_k0, s);
+    COMPILER_ASSERT(sizeof stream.key <= sizeof m0);
+    for (i = (size_t) 0U; i < sizeof stream.key; i++) {
+        stream.key[i] ^= m0[i];
+    }
+    sodium_memzero(m0, sizeof m0);
+}
+
+static void
+randombytes_salsa20_random_stir_if_needed(void)
+{
+#ifdef _MSC_VER
+    if (stream.initialized == 0) {
+        randombytes_salsa20_random_stir();
+    }
+#else
+    const pid_t pid = getpid();
+
+    if (stream.initialized == 0 || stream.pid != pid) {
+        stream.pid = pid;
+        randombytes_salsa20_random_stir();
+    }
+#endif
+}
+
+static void
+randombytes_salsa20_random_rekey(const unsigned char * const mix)
+{
+    unsigned char *key = stream.key;
+    size_t         i;
+
+    for (i = (size_t) 0U; i < sizeof stream.key; i++) {
+        key[i] ^= mix[i];
+    }
+}
+
+static uint32_t
+randombytes_salsa20_random_getword(void)
+{
+    uint32_t val;
+    int      ret;
+
+    COMPILER_ASSERT(sizeof stream.rnd32 >= (sizeof stream.key) + (sizeof val));
+    COMPILER_ASSERT(((sizeof stream.rnd32) - (sizeof stream.key))
+                    % sizeof val == (size_t) 0U);
+    if (stream.rnd32_outleft <= (size_t) 0U) {
+        randombytes_salsa20_random_stir_if_needed();
+        COMPILER_ASSERT(sizeof stream.nonce == crypto_stream_salsa20_NONCEBYTES);
+        ret = crypto_stream_salsa20((unsigned char *) stream.rnd32,
+                                    (unsigned long long) sizeof stream.rnd32,
+                                    (unsigned char *) &stream.nonce,
+                                    stream.key);
+        assert(ret == 0);
+        stream.rnd32_outleft = (sizeof stream.rnd32) - (sizeof stream.key);
+        randombytes_salsa20_random_rekey(&stream.rnd32[stream.rnd32_outleft]);
+        stream.nonce++;
+    }
+    stream.rnd32_outleft -= sizeof val;
+    memcpy(&val, &stream.rnd32[stream.rnd32_outleft], sizeof val);
+    memset(&stream.rnd32[stream.rnd32_outleft], 0, sizeof val);
+
+    return val;
+}
+
+int
+randombytes_salsa20_random_close(void)
+{
+    int ret = -1;
+
+#ifndef _WIN32
+    if (stream.random_data_source_fd != -1 &&
+        close(stream.random_data_source_fd) == 0) {
+        stream.random_data_source_fd = -1;
+        stream.initialized = 0;
+        ret = 0;
+    }
+#else /* _WIN32 */
+    if (stream.initialized != 0) {
+        stream.initialized = 0;
+        ret = 0;
+    }
+#endif
+    return ret;
+}
+
+uint32_t
+randombytes_salsa20_random(void)
+{
+    return randombytes_salsa20_random_getword();
+}
+
+void
+randombytes_salsa20_random_buf(void * const buf, const size_t size)
+{
+    int ret;
+
+    randombytes_salsa20_random_stir_if_needed();
+    COMPILER_ASSERT(sizeof stream.nonce == crypto_stream_salsa20_NONCEBYTES);
+#ifdef ULONG_LONG_MAX
+    /* coverity[result_independent_of_operands] */
+    assert(size <= ULONG_LONG_MAX);
+#endif
+    ret = crypto_stream_salsa20((unsigned char *) buf, (unsigned long long) size,
+                                (unsigned char *) &stream.nonce, stream.key);
+    assert(ret == 0);
+    stream.nonce++;
+    crypto_stream_salsa20_xor(stream.key, stream.key, sizeof stream.key,
+                              (unsigned char *) &stream.nonce, stream.key);
+}
+
+/*
+ * randombytes_salsa20_random_uniform() derives from OpenBSD's arc4random_uniform()
+ * Copyright (c) 2008, Damien Miller <djm@openbsd.org>
+ */
+
+uint32_t
+randombytes_salsa20_random_uniform(const uint32_t upper_bound)
+{
+    uint32_t min;
+    uint32_t r;
+
+    if (upper_bound < 2) {
+        return 0;
+    }
+    min = (uint32_t) (-upper_bound % upper_bound);
+    for (;;) {
+        r = randombytes_salsa20_random();
+        if (r >= min) {
+            break;
+        }
+    } /* LCOV_EXCL_LINE */
+    return r % upper_bound;
+}
+
+const char *
+randombytes_salsa20_implementation_name(void)
+{
+    return "salsa20";
+}
+
+struct randombytes_implementation randombytes_salsa20_implementation = {
+    SODIUM_C99(.implementation_name =) randombytes_salsa20_implementation_name,
+    SODIUM_C99(.random =) randombytes_salsa20_random,
+    SODIUM_C99(.stir =) randombytes_salsa20_random_stir,
+    SODIUM_C99(.uniform =) randombytes_salsa20_random_uniform,
+    SODIUM_C99(.buf =) randombytes_salsa20_random_buf,
+    SODIUM_C99(.close =) randombytes_salsa20_random_close
+};